//toggle formatText
;(function($) {
    $.formatInput = function(obj) {
        var $_obj = $(obj);
        $_obj.each(function() {
            var $_that = $(this);
            var _text = $_that.val();
            $_that.focus(function() {
                var _nowText = $_that.val();
                if (_nowText == _text) {
                    $_that.val("");
                }
            }).blur(function() {
                if ($_that.val() == "") {
                    $_that.val(_text);
                }
            });
        });
    }
})(jQuery);